1. Clean up doSystem code
2. Optimize wizard steps check
3. Add CSS rule for table td/th as center/middle and remove duplicate code in JS
4. Fix arrow position when window resize
5. Fix popContent size when window resize
6. Make sure popContent will fit window size without large margin
7. Update VLAN add/delete/edit method to fulfill style as other function page
8. Update Route Table add/delete/edit method to fulfill style as other function page
9. Clearn up VLAN and Route Table template
10. Update warning method if update fail
11. Update pagination position
12. Fix some display issue
13. Update gateway icon as icon-road